Okla. Stat. tit. 14A, § 14A-2-304

(1) Except as otherwise specifically provided, if a seller is

required to give to a buyer a statement of the rate of the credit

service charge he shall state the rate in terms of an annual

percentage rate as defined in subsection (2) or in terms of a

corresponding nominal annual percentage rate as defined in

subsection (3), whichever is appropriate.

(2) "Annual percentage rate"

(a) with respect to a consumer credit sale other than one

made pursuant to a revolving charge account, is either

(i) that nominal annual percentage rate which, when

applied to the unpaid balances of the amount

financed calculated according to the actuarial

method, will yield a sum equal to the amount of

the credit service charge; or

(ii) that rate determined by any method prescribed by

rule by the Administrator as a method which

materially simplifies computation while retaining

reasonable accuracy as compared with the rate

determined pursuant to subparagraph (i);

(b) with respect to a consumer credit sale made pursuant

to a revolving charge account, is the quotient

Oklahoma Statutes - Title 14A. Consumer Credit Code Page 40

expressed as a percentage of the total credit service

charge for the period to which it related divided by

the amount upon which the credit service charge for

that period is based, multiplied by the number of

these periods in a year.

(3) "Corresponding nominal annual percentage rate" is the

percentage or percentages used to calculate the credit service

charge for one billing cycle or other period pursuant to a revolving

charge account multiplied by the number of billing cycles or periods

in a year.

(4) If a seller is permitted to make the same credit service

charge for all amounts financed within a specified range (subsection

(5) of Section 2-201) or for all balances within a specified range

(subsection (2) of Section 2-207), he shall state the annual

percentage rate or corresponding nominal annual percentage rate,

whichever is appropriate, as applied to the median amount of the

range within which the actual amount financed or balance is

included.

(5) A statement of rate complies with this part if it does not

vary from the accurately computed rate by more than the following

tolerances:

(a) the annual percentage rate may be rounded to the

nearest quarter of one percent (1/4 of 1%) or may fall

within a tolerance not greater than one-eighth of one

percent (1/8 of 1%) more or less than the actual rate

for consumer credit sales payable in substantially

equal installments when a seller determines the total

credit service charge on the basis of a single add-on,

discount, periodic, or other rate, and the rate is

converted into an annual percentage rate under

procedures prescribed by rule by the Administrator;

(b) the Administrator may authorize by rule the use of

rate tables or charts which may provide for the

disclosure of annual percentage rates which vary from

the rate determined in accordance with paragraph (a)

by not more than the tolerances the Administrator may

allow; the Administrator may not allow a tolerance

greater than eight percent (8%) of that rate except to

simplify compliance where irregular payments are

involved; and

(c) in case a seller determines the annual percentage rate

in a manner other than as described in paragraph (a)

or (b), the Administrator may authorize by rule other

reasonable tolerances.